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WO2013099672A1 - Dispositif d'allumage, procédé d'allumage et moteur - Google Patents

Dispositif d'allumage, procédé d'allumage et moteur Download PDF

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Publication number
WO2013099672A1
WO2013099672A1 PCT/JP2012/082636 JP2012082636W WO2013099672A1 WO 2013099672 A1 WO2013099672 A1 WO 2013099672A1 JP 2012082636 W JP2012082636 W JP 2012082636W WO 2013099672 A1 WO2013099672 A1 WO 2013099672A1
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WO
WIPO (PCT)
Prior art keywords
exposed surface
boundary
electrode
insulator
tip
Prior art date
Application number
PCT/JP2012/082636
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English (en)
Japanese (ja)
Inventor
漆原　友則
隆太 河野
亘 塩野谷
田中　克典
Original Assignee
日本碍子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本碍子株式会社 filed Critical 日本碍子株式会社
Publication of WO2013099672A1 publication Critical patent/WO2013099672A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/01—Electric spark ignition installations without subsequent energy storage, i.e. energy supplied by an electrical oscillator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/46—Sparking plugs having two or more spark gaps
    • H01T13/467—Sparking plugs having two or more spark gaps in parallel connection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/52—Sparking plugs characterised by a discharge along a surface

Definitions

  • the present invention relates to an ignition method for igniting an air-fuel mixture, an ignition device for igniting an air-fuel mixture, and an engine.
  • a typical spark plug includes a center electrode and side electrodes.
  • a discharge gap is formed between the center electrode and the side electrode.
  • the gap length of the discharge gap depends on the pulse voltage waveform, the composition of the gas mixture, the pressure, the temperature, and the like, but is typically about 1 mm.
  • a pulse voltage is applied between the center electrode and the side electrodes, and a discharge is generated in the discharge gap.
  • the mixture is ignited by the discharge, and a flame is generated in the discharge gap.
  • Patent Document 1 describes a conventional creeping discharge type plug.
  • An object of the present invention is to provide an ignition method, an ignition device, and an engine that can stably ignite an air-fuel mixture even under difficult combustion conditions.
  • the first to third aspects of the present invention are directed to an ignition method for igniting an air-fuel mixture.
  • a plug is prepared, creeping discharge is generated, and plasma is generated by creeping discharge.
  • a flame is induced in the air-fuel mixture at the same time as plasma generation or after plasma generation.
  • the plug includes a structure, a first electrode, and a second electrode.
  • the structure is made of an insulator.
  • the first electrode and the second electrode are made of a conductor.
  • the structure extends in the axial direction from the root to the tip.
  • the structure has an insulator exposed surface exposed to the external space.
  • the insulator exposed surface continues from the base side boundary to the tip side boundary.
  • the boundary on the root side and the boundary on the tip side are separated in the axial direction.
  • the first electrode has a first conductor exposed surface exposed to the external space.
  • the first conductor exposed surface is in contact with the insulator exposed surface at the base side boundary.
  • the second electrode has a second conductor exposed surface exposed to the external space.
  • the second conductor exposed surface is in contact with the insulator exposed surface at the tip side boundary.
  • Creepage discharge connects the boundary on the base side and the boundary on the tip side, and follows the exposed surface of the insulator.
  • the second aspect of the present invention adds further matters to the first aspect of the present invention.
  • the maximum diameter of the structure is narrower than the shortest axial distance from the base-side boundary to the tip-side boundary.
  • the second electrode includes a rod-shaped body that extends in the axial direction and is embedded in the structure.
  • a dielectric barrier discharge is generated between the first electrode and the rod-shaped body before the creeping discharge is generated.
  • the fourth to tenth aspects of the present invention are directed to an ignition device that ignites an air-fuel mixture.
  • a plug and a pulse voltage application mechanism are provided.
  • the plug is the same as the plug of the first aspect of the present invention.
  • the pulse voltage application mechanism is configured to apply a pulse voltage between the first electrode and the second electrode.
  • the pulse voltage has a waveform that generates creeping discharge along the exposed surface of the insulator. Creeping discharge connects the boundary on the root side and the boundary on the tip side.
  • the fifth aspect of the present invention adds further matters to the fourth aspect of the present invention.
  • the maximum diameter of the structure is narrower than the shortest axial distance from the base side boundary to the tip side boundary.
  • the sixth aspect of the present invention adds further matters to the fourth or fifth aspect of the present invention.
  • a triple point on the root side where the structure, the first electrode, and the external space gather is formed at the boundary on the root side.
  • the angle formed by the insulator exposed surface and the first conductor exposed surface across the external space at the triple point on the root side is set to an acute angle.
  • a triple point on the distal end side where the structure, the second electrode, and the external space gather is formed at the boundary on the distal end side.
  • the angle formed by the insulator exposed surface and the second conductor exposed surface across the external space at the triple point on the front end side is set to an acute angle.
  • the seventh aspect of the present invention adds further matters to any one of the fourth to sixth aspects of the present invention.
  • the second electrode includes a rod-shaped body that extends in the axial direction and is embedded in the structure.
  • the pulse voltage application mechanism applies a preceding pulse voltage having a waveform for generating a dielectric barrier discharge between the first electrode and the second electrode before the pulse voltage having a waveform for generating a creeping discharge. Composed.
  • the dielectric barrier discharge is generated between the first electrode and the rod-shaped body.
  • the second electrode includes a rod-shaped body that extends in the axial direction and is embedded in the structure.
  • the structure has a tapered shape with a diameter decreasing from the root toward the tip.
  • the ninth aspect of the present invention adds further matters to the seventh aspect of the present invention.
  • the structure has a tapered shape whose diameter decreases from the root toward the tip.
  • the tenth aspect of the present invention adds further matters to any of the fourth to ninth aspects of the present invention.
  • the dielectric has a relative dielectric constant of 10 or more.
  • the eleventh aspect of the present invention is directed to an engine.
  • a combustion container and the ignition device of the fourth aspect of the present invention are provided.
  • a combustion chamber filled with the air-fuel mixture is formed.
  • the plug is attached to the combustion vessel.
  • the insulator exposed surface, the first conductor exposed surface, and the second conductor exposed surface are exposed to the combustion chamber.
  • the twelfth aspect of the present invention adds further matters to the eleventh aspect of the present invention.
  • the maximum diameter of the structure is smaller than the shortest axial distance from the base-side boundary to the tip-side boundary.
  • the discharge start voltage is lowered and the discharge distance is lengthened.
  • the plug diameter is reduced and the volume occupied by the plug is reduced.
  • the diameter of the plug is further reduced, and the volume occupied by the plug is reduced.
  • the resistance of the discharge path of the creeping discharge is reduced, and the creeping discharge is likely to occur.
  • the diameter of the plug is further reduced, and the volume occupied by the plug is reduced.
  • the electric field concentrates at the triple point, and creeping discharge is likely to occur. Even if the electrode is worn, the creeping discharge is hardly affected, and the durability of the plug is improved.
  • the resistance of the discharge path of the creeping discharge is lowered, and the creeping discharge is likely to occur.
  • the insulator covering the rod-shaped body is thinned near the tip, the dielectric barrier discharge is promoted, and the creeping discharge is likely to occur.
  • the insulator covering the rod-shaped body becomes thicker near the root, and the rod-shaped body is easily insulated.
  • dielectric barrier discharge is promoted and creeping discharge is likely to occur.
  • the diameter of the plug is further reduced, and the volume occupied by the plug is reduced.
  • This desirable embodiment relates to an ignition device for igniting an air-fuel mixture, an ignition method for igniting an air-fuel mixture, and an engine.
  • FIG. 1 The schematic diagram of FIG. 1 shows a preferred embodiment of the engine.
  • the engine 1000 includes a combustion container 1020, an intake mechanism 1022, an exhaust mechanism 1024, and an ignition device 1026.
  • the ignition device 1026 includes a plug 1040 and a pulse voltage application mechanism 1042.
  • the combustion container 1020 includes a main body 1060 and a piston 1062.
  • a combustion chamber 1080 is formed in the combustion container 1020.
  • the pulse voltage application mechanism 1042 includes a pulse generation circuit 1100 and a cable 1102.
  • Engine operation When engine 1000 is operated, the air-fuel mixture is sucked into combustion chamber 1080 by intake mechanism 1022, and combustion chamber 1080 is filled with the air-fuel mixture.
  • the air-fuel mixture filling the combustion chamber 1080 is compressed by the piston 1062 toward the top dead center.
  • the ignition device 1026 ignites the compressed air-fuel mixture.
  • the air-fuel mixture burns and the piston 1062 moves toward the bottom dead center. Exhaust from the combustion chamber 1080 is performed by the exhaust mechanism 1024.
  • engine 1000 is a direct injection engine, air is sucked into combustion chamber 1080 by intake mechanism 1022 and fuel oil is injected into combustion chamber 1080.
  • FIGS. 2 and 3 show a preferred embodiment of the plug. 2 and 3 are a perspective view and a cross-sectional view, respectively.
  • the plug 1040 includes an insulator 1140, a metal shell 1142, and a center electrode 1144.
  • the insulator 1140 includes a protruding structure 1160 and a accommodated structure 1162.
  • the protruding structure 1160 has an insulator exposed surface 1180.
  • the center electrode 1144 includes a tip cap 1200 and a rod-shaped body 1202.
  • the tip cap 1200 has a conductor exposed surface 1184.
  • the metal shell 1142 has a conductor exposed surface 1182.
  • the discharge start voltage is lower than when the air-fuel mixture is ignited by discharge other than creeping discharge. Accordingly, the insulator covering the center electrode 1144 can be thinned, and the diameter of the plug 1040 can be reduced. In addition, smoldering of the insulator 1140, that is, carbon adhering to the surface of the insulator 1140 due to combustion of the air-fuel mixture is burned off by creeping discharge. Thereby, the smoldering resistance is improved.
  • the protruding structure 1160 extends from the root 1220 to the tip 1222 in the direction of the central axis 1240.
  • the central axis 1240 extends straight but may be slightly bent.
  • the insulator exposed surface 1180 of the projecting structure 1160, the conductor exposed surface 1182 of the metal shell 1142, and the conductor exposed surface 1184 of the tip cap 1200 are in the combustion chamber 1080 in the external space. Exposed to. Thereby, when creeping discharge along the insulator exposed surface 1180 of the protruding structure 1160 occurs, plasma is generated in the combustion chamber 1080 by the creeping discharge, and ignition of the air-fuel mixture filling the combustion chamber 1080 is performed.
  • the insulator exposed surface 1180 of the protruding structure 1160 is continuous from the boundary 1260 on the root 1220 side to the boundary 1262 on the tip 1222 side. Thereby, a boundary discharge path along the insulator exposed surface 1180 of the protruding structure 1160 is formed by connecting the boundary 1260 on the root 1220 side and the boundary 1262 on the tip 1222 side.
  • the discharge start voltage of creeping discharge is low. Therefore, when a creeping discharge path is formed, the discharge start voltage is lowered and the discharge distance is increased. When the discharge distance becomes longer, the plasma spreads greatly. Thus, the air-fuel mixture can be stably ignited even under difficult combustion conditions such as when lean combustion is performed.
  • the insulator exposed surface 1180 of the protruding structure 1160 and the conductor exposed surface 1182 of the metal shell 1142 are in contact with each other at the boundary 1260 on the root 1220 side.
  • the insulator exposed surface 1180 of the protruding structure 1160 and the conductor exposed surface 1182 of the metallic shell 1142 are continuous with the boundary 1260 on the linear root 1220 side interposed therebetween. As a result, the discharge starting from the conductor exposed surface 1182 of the metallic shell 1142 starts or ends along the insulator exposed surface 1180 of the protruding structure 1160.
  • the insulator exposed surface 1180 of the protruding structure 1160 and the conductor exposed surface 1184 of the tip cap 1200 are in contact with each other at the boundary 1262 on the tip 1222 side.
  • the insulator exposed surface 1180 of the protruding structure 1160 and the conductor exposed surface 1184 of the tip cap 1200 are continuous with the boundary 1262 on the linear tip 1222 side interposed therebetween. As a result, the discharge starting from the conductor exposed surface 1184 of the tip cap 1200 extends along the insulator exposed surface 1180 of the protruding structure 1160.
  • the boundary 1260 on the root 1220 side and the boundary 1262 on the tip 1222 side are separated in the direction of the central axis 1240.
  • the maximum diameter D of the protruding structure 1160 is desirably smaller than the shortest distance L in the direction of the central axis 1240 from the boundary 1260 on the root 1220 side to the boundary 1262 on the tip 1222 side. Thereby, the diameter of the plug 1040 is reduced, and the volume occupied by the plug 1040 is reduced. However, even when the maximum diameter D is not smaller than the shortest distance L, the effect of the plug to broaden the plasma P is not completely lost.
  • the maximum diameter D of the protruding structure 1160 is the maximum value of the dimension of the protruding structure 1160 in the radial direction perpendicular to the central axis 1240.
  • the reduction in the maximum diameter D of the protruding structure 1160 slightly reduces the insulating property of the center electrode 1144.
  • the plug 1040 since the discharge start voltage is reduced due to the use of creeping discharge, no major problem occurs even if the insulation of the center electrode 1144 is slightly reduced.
  • the decrease in the volume occupied by the plug 1040 facilitates attaching two or more plugs 1040 to the combustion vessel 1020, and facilitates multipoint ignition to the air-fuel mixture. According to the multipoint ignition, the air-fuel mixture can be stably ignited even under difficult combustion conditions such as when lean combustion is performed.
  • FIG. 4 shows the waveform of the pulse voltage applied to the plug.
  • FIG. 5 shows a waveform of a pulse current flowing through the plug.
  • the schematic diagrams from FIG. 6 to FIG. 8 show the flow of ignition.
  • the dielectric barrier discharge DBD occurs between the two.
  • the plasma formed by the dielectric barrier discharge DBD has conductivity. For this reason, the dielectric barrier discharge DBD reduces the resistance of the discharge path of the creeping discharge along the insulator exposed surface 1180 of the protruding structure 1160, and the creeping discharge along the insulator exposed surface 1180 of the protruding structure 1160 occurs. It becomes easy.
  • a secondary pulse voltage PV2 is applied between the metal shell 1142 and the center electrode 1144 as shown in FIG.
  • the creeping discharge CD connects a boundary 1260 on the root 1220 side and a boundary 1262 on the tip 1222 side.
  • the irregular plasma P is generated by the creeping discharge CD along the insulator exposed surface 1180 of the protruding structure 1160.
  • a flame is induced simultaneously with the generation of the plasma P or after the generation of the plasma P, and the mixture is ignited.
  • a flame may be triggered after the generation of the plasma P.
  • the secondary pulse current PC2 is significantly larger than the primary pulse current PC1.
  • the secondary pulse voltage PV2 is lower than the primary pulse voltage PV1.
  • Generating the creeping discharge CD after generating the dielectric barrier discharge DBD contributes to reducing the discharge start voltage and facilitating the generation of the creeping discharge CD.
  • the discharge start voltage is slightly increased, it is allowed to generate the creeping discharge CD without generating the dielectric barrier discharge DBD.
  • the primary pulse voltage PV1 is a repetition of two or more single pulses as shown in FIG. 4, but may be one single pulse.
  • the secondary pulse voltage PV2 is also a repetition of two or more single pulses as shown in FIG. 4, but may be one single pulse.
  • the waveform of each single pulse constituting the repetition of two or more single pulses may be different.
  • the peak voltage of the primary pulse voltage PV1 is 5 to 30 kV, and the half width is 0.1 to 20 ⁇ s. Preferably, the half width is 100 to 1000 ns. When two or more single pulses are repeated, the repetition frequency is 10 to 200 kpps.
  • the peak voltage of the secondary pulse voltage PV2 is 0.3 to 10 kV, and the half width is 0.2 to 20 ⁇ s. Preferably, the half width is 1 to 20 ⁇ s.
  • the repetition frequency is 10 to 600 kpps. Preferably, the repetition frequency is 10 to 200 kpps.
  • the primary pulse voltage PV1 and the secondary pulse voltage PV2 are unipolar positive pulses, the center electrode 1144 becomes an anode, and the metal shell 1142 becomes a cathode.
  • the primary pulse voltage PV1 and the secondary pulse voltage PV2 are unipolar negative pulses, the center electrode 1144 becomes a cathode, and the metal shell 1142 becomes an anode.
  • the primary pulse voltage PV1 and the secondary pulse voltage PV2 may be bipolar.
  • the secondary pulse voltage PV2 is a repetition of two or more single pulses and the repetition frequency is sufficiently high, the plasma P spreads greatly. This is because further plasma is generated by the subsequent single pulse and the plasma grows before the plasma generated by the application of the previous single pulse disappears.
  • the schematic diagram in FIG. 9 is a cross-sectional view in the vicinity of the boundary on the root side.
  • a triple point on the side of the root 1220 where the protruding structure 1160, the metal shell 1142 and the combustion chamber 1080 gather is formed at the boundary 1260 on the side of the root 1220.
  • the insulator exposed surface 1180 of the protruding structure 1160 and the conductor exposed surface of the metal shell 1142 (the inner peripheral surface of the round hole 1280 of the metal shell 1142) 1182 are desirably combustion chambers.
  • An angle ⁇ ⁇ b> 1 formed with 1080 interposed therebetween is set to an acute angle.
  • 10 is a cross-sectional view in the vicinity of the boundary on the tip side.
  • a triple point on the side of the front end 1222 where the protruding structure 1160, the front end cap 1200, and the combustion chamber 1080 gather is formed at the boundary 1262 on the side of the front end 1222.
  • an angle ⁇ 2 formed by the insulator exposed surface 1180 of the protruding structure 1160 and the conductor exposed surface (inner surface of the collar 1300) 1184 of the tip cap 1200 sandwiching the combustion chamber 1080. Is set to an acute angle.
  • the electric field concentrates on the triple point on the tip 1222 side, and creeping discharge CD is likely to occur. Even if the center electrode 1144 is worn, the creeping discharge CD is hardly affected, and the durability of the plug 1040 is improved.
  • the formed angles ⁇ 1 and ⁇ 2 are preferably 90 ° or less, and more preferably about 14 °. It is desirable that the formed angles ⁇ 1 and ⁇ 2 are acute angles. However, even when the formed angles ⁇ 1 and ⁇ 2 are not acute angles, the utility of the plug 1040 for greatly expanding the plasma P is not lost.
  • 11 and 12 are cross-sectional views showing the principle of electric field concentration at the triple point.
  • a high dielectric constant material (for example, ceramics) 1500 having a relatively high dielectric constant and a low dielectric constant material (for example, air) 1502 having a relatively low dielectric constant are connected to the ground plane 1520.
  • a two-dimensional model existing between the high-pressure surface 1522 is created.
  • An angle ⁇ between the interface 1540 between the high dielectric constant material 1500 and the low dielectric constant material 1502 and the ground plane 1520 sandwiching the low dielectric constant material 1502 is set to an acute angle.
  • a round hole 1280 is formed in the metal shell 1142.
  • the accommodated portion 1162 is accommodated inside the round hole 1280.
  • the metal shell 1142 may be replaced with a shape that is difficult to call “metal metal”.
  • the metallic shell 1142 may be replaced with a three-dimensional object such as a plate, a rod, or a rectangular parallelepiped in which the round hole 1280 is formed.
  • the round hole 1280 may be replaced with a hole having another shape.
  • the discharge start point or end point is in the vicinity of the opening. For this reason, the metal shell 1142 may be replaced with a ring-shaped object disposed in the vicinity of the root 1220 of the protruding structure 1160.
  • the center electrode 1144 is electrically insulated from the metallic shell 1142 by the insulator 1140 and is mechanically fixed to the central shaft 1240 of the metallic shell 1142.
  • the rod-shaped body 1202 has a round bar shape.
  • the bar-shaped body 1202 may have a bar shape other than the round bar shape.
  • the rod-shaped body 1202 is embedded in the insulator 1140 and extends in the direction of the central axis 1240.
  • the rod-shaped body 1202 is embedded at least in the section from the root 1220 to the tip 1222 of the protruding structure 1160.
  • the metallic shell 1142 and the rod-shaped body 1202 are separated by the protruding structure 1160, and the dielectric barrier discharge DBD is generated in the space where the discharge path of the creeping discharge CD exists.
  • the rod-shaped body 1202 also reaches the inside of the accommodated structure 1162.
  • the tip cap 1200 is exposed to the outside of the insulator 1140.
  • the tip cap 1200 is disposed at the tip 1222 of the protruding structure 1160.
  • the tip side of the tip cap 1200 is rounded. Thereby, wear on the tip side of the tip cap 1200 is suppressed.
  • a collar 1300 extends from the base side of the tip cap 1200. As a result, a tip accommodating space that is widened toward the bottom of the tip cap 1200 is formed.
  • the leading end 1222 of the protruding structure 1160 is accommodated in the leading end accommodating space. Thereby, the tip cap 1200 is fixed to the protruding structure 1160.
  • the protruding structure 1160 has a tapered shape (tapered shape) whose diameter decreases from the root 1220 toward the tip 1222.
  • the insulator covering the rod-shaped body 1202 on the tip 1222 side is thinned, the dielectric barrier discharge DBD is promoted, and the creeping discharge CD is easily generated. Further, the insulator covering the rod-shaped body 1202 becomes thicker on the side of the root 1220 approaching the opening of the metal shell 1142, and the insulation of the rod-shaped body 1202 becomes easy.
  • the plasma P is increased.
  • the utility of the plug to spread is not completely lost.
  • the protruding structure 1160 protrudes from the opening of the round hole 1280 of the metal shell 1142.
  • the accommodated structure 1162 is accommodated inside the round hole 1280 of the metal shell 1142.
  • the cross-sectional shape of the accommodated structure 1162 matches the cross-sectional shape of the round hole 1280 of the metal shell 1142.
  • the accommodated structure 1162 is fixed to the round hole 1280 of the metal shell 1142, and the insulator 1140 is fixed to the metal shell 1142.
  • the protruding structure 1160 is held in a state of protruding from the opening of the metal shell 1142 and the metal shell 1142 and the center electrode 1144 are insulated to such an extent that a pulse voltage having the waveform shown in FIG.
  • the shape, structure, and the like of 1162 may be changed.
  • the protruding structure 1160 and the accommodated structure 1162 may not be integrated.
  • the insulator 1140 is made of an insulator.
  • the insulator ceramics such as alumina and zirconia may be employed, and resins such as vinyl chloride resin and fluororesin may be employed.
  • the material of insulator 1140 is preferably selected from insulators having a relative dielectric constant of 10 or more. Thereby, the dielectric barrier discharge DBD is promoted, and the creeping discharge CD is easily generated.
  • the metal shell 1142 and the center electrode 1144 are made of a conductor.
  • a conductor a metal such as platinum may be employed, an alloy such as stainless steel or nickel alloy may be employed, or conductive ceramics may be employed.
  • the center electrode 1144 and the positive electrode 1120 of the pulse generation circuit 1100 are electrically connected by a cable 1102.
  • the metal shell 1142 and the negative electrode 1122 of the pulse generation circuit 1100 are grounded.
  • the pulse generation circuit 1100 When the pulse generation circuit 1100 generates a pulse voltage between the positive electrode 1120 and the negative electrode 1122, the pulse voltage is applied between the center electrode 1144 of the plug 1040 and the metal shell 1142.
  • the cable 1102 may be omitted, and the positive electrode 1120 of the pulse generation circuit 1100 may be directly attached to the center electrode 1144.
  • the type of the pulse generation circuit 1100 is preferably an inductive energy storage type. However, the form of the pulse generation circuit 1100 may be other than the induction energy storage type.
  • circuit constants are selected so that a pulse voltage having the waveform shown in FIG. 4 can be generated.
  • the pulse generation circuit 1100 is controlled by the controller so that a pulse voltage having the waveform shown in FIG. 4 can be generated.
  • the engine 1000 is preferably a reciprocating engine.
  • the reciprocating engine may be either a 4-cycle engine or a 2-cycle engine.
  • the engine 1000 may be other than the reciprocating engine.
  • the engine 1000 may be a rotary engine.
  • the engine 1000 may be a gas engine, a gas turbine engine, or a jet engine.
  • the engine 1000 is typically incorporated in an automobile. However, the engine 1000 may be incorporated in a transport machine other than an automobile. For example, the engine 1000 may be incorporated in a railway vehicle, an industrial vehicle, a ship, an aircraft, a spacecraft, or the like. The engine 1000 may be incorporated in a machine other than the transport machine. For example, the engine 1000 may be incorporated in a tool, a farm tool, an engine generator, or the like.
  • the air-fuel mixture is a mixture of air and fuel oil.
  • the air-fuel mixture may be a mixture of air and combustible gas.
  • the air-fuel mixture may be a mixture of air and hydrogen gas, propane gas, butane gas, or the like.
  • the combustible gas may be a mixture.
  • Air may be replaced with other types of flammable gases.
  • air may be replaced with oxygen.
  • the fuel oil may be replaced with other types of flammable liquids.
  • the fuel oil may be replaced with methanol.
  • the pressure of the air-fuel mixture is typically atmospheric pressure, but may be reduced or increased.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

L'invention concerne un moteur, un dispositif d'allumage et un procédé d'allumage permettant un allumage stable du mélange air-carburant, même dans des conditions d'allumage difficiles. Un connecteur mâle comprend une structure, une première électrode et une seconde électrode. La structure s'étend dans la direction axiale de la base à l'extrémité distale. La structure a une surface d'exposition d'isolant qui est exposée à l'espace extérieur. La surface d'exposition d'isolant est continue depuis la limite côté base à la limite côté extrémité distale. La limite côté base et la limite côté extrémité distale sont séparées dans la direction axiale. Une tension en impulsion est appliquée entre la première électrode et la seconde électrode, et une décharge lente est générée le long de la surface d'exposition d'isolant. La décharge lente relie la limite côté base et la limite côté extrémité distale.
PCT/JP2012/082636 2011-12-28 2012-12-17 Dispositif d'allumage, procédé d'allumage et moteur WO2013099672A1 (fr)

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JP2011289060 2011-12-28
JP2011-289060 2011-12-28

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WO2013099672A1 true WO2013099672A1 (fr) 2013-07-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018110261A1 (fr) * 2016-12-15 2018-06-21 株式会社デンソー Système et dispositif de commande d'allumage
US10720760B2 (en) 2018-10-03 2020-07-21 Denso Corporation Spark plug for internal combustion engine
US10886708B2 (en) 2017-03-31 2021-01-05 Denso Corporation Spark plug for internal combustion engine

Citations (6)

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JPS51124536U (fr) * 1975-04-04 1976-10-08
JPS53123731A (en) * 1977-04-06 1978-10-28 Ngk Spark Plug Co Ltd Ignition system
JPS63500970A (ja) * 1985-09-17 1988-04-07 ロ−ベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング 沿面放電式の点火プラグ
WO1999027625A1 (fr) * 1997-11-25 1999-06-03 Renault Bougie d'allumage a effet de surface
JP2010272323A (ja) * 2009-05-20 2010-12-02 Nippon Soken Inc プラズマ点火装置
JP2011034953A (ja) * 2009-02-26 2011-02-17 Ngk Insulators Ltd プラズマイグナイター及び内燃機関の点火装置

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JPS51124536U (fr) * 1975-04-04 1976-10-08
JPS53123731A (en) * 1977-04-06 1978-10-28 Ngk Spark Plug Co Ltd Ignition system
JPS63500970A (ja) * 1985-09-17 1988-04-07 ロ−ベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング 沿面放電式の点火プラグ
WO1999027625A1 (fr) * 1997-11-25 1999-06-03 Renault Bougie d'allumage a effet de surface
JP2011034953A (ja) * 2009-02-26 2011-02-17 Ngk Insulators Ltd プラズマイグナイター及び内燃機関の点火装置
JP2010272323A (ja) * 2009-05-20 2010-12-02 Nippon Soken Inc プラズマ点火装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018110261A1 (fr) * 2016-12-15 2018-06-21 株式会社デンソー Système et dispositif de commande d'allumage
US10886708B2 (en) 2017-03-31 2021-01-05 Denso Corporation Spark plug for internal combustion engine
US10720760B2 (en) 2018-10-03 2020-07-21 Denso Corporation Spark plug for internal combustion engine

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